Box-car-unloading apparatus



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du-uq Original Filed Oct. 18, 1919 Patented May 3, 1927.

UNITED STATES PATENT OFFICE.

WILLIAM SUNDBERG, DECEASED, LATE OF CHICAGO, ILLINOIS; BY ELIZABETH L.

SUNDBERG, ADMINISTRATRIX, OF CHICAGO, ILLINOIS, ASSIGNOR TO ELIZABETH L.SUNDBERG, TRUSTEE, OF CHICAGO, ILLINOIS.

BOX-CAR-UNLOADING APPARATUS.

Continuation of application Serial No. 331,561, filed October 18, 1919.This application filed December 16, 1922. Serial No. 607,311.

This application is a continuation of copending application Serial No.331,561, filed October 18th, 1919, by William Sundberg, now deceased.

Among the objects of the invention the following may be noted:

The provision of apparatus of relatively simple construction, adapted tounload railroad cars of the box type, containing grain, coal, or othermaterials in bulk, in a minimum period of time and at a minimum cost;

The provision of apparatus so constructed that it may be readilyinstalled in existing unloading plants without making extensive changesin such plants; p y The provision of apparatus so constructed that itmay be mounted upon a car equipped with standard gauge trucks andadapted to be run upon a track extending alongside of the track on whichthe cars to be unloaded are placed so that the apparatus may be placedopposite the respective adjacent side doors of the cars to be unloaded;

The provision of a car for supporting the unloading apparatus, which ispreferably self-propelled;

The provision of a turn-table on the car and on which the unloadingapparatus is mounted so that the apparatus may be run on a track locatedbet-ween two tracks on which cars to be unloaded may be placed,

whereby the unloading apparatus may be swung around to operate in carson either side; V

The provision of means whereby the turntable may be raised or lowered,thus placing the apparatus at the desired height with respect to eachindividual car to be unloaded The provision of a frame for supportingthe unloading apparatus which is slidably mounted on the turn-table incombination with means for moving the frame, whereby the forward end ofthe frame may be inserted through one of the side doors of a box car toposition theunloading apparatus in the car, means also being providedfor withdrawing the frame and the associated apparatus from the car;

The provision of means, preferably in the form of'a flight conveyorcarried on the under side of the frame, so arranged that it will dragthe material from that portion of the car adjacent the door throughwhich the apparatus is inserted so as to clear a pathway for the forwardend of theframe as the latter is progressively moved into the car; a,

The provision of means adapted to re-- move the material in therespective ends of the car into the path of the flight'convey'or, saidmeans preferably including a pair of shovels adapted to be movedbackwardly and forwardly in the car;

The provision of extensible supports for the shovels adapted to extendfrom opposite sides of the frame into the respective ends of the car,said extensible supports preferably being in the form of telescopiccylinders which may be extended by compressed air;

The provision of means whereby forward movement'of the frame into thecar to be unloaded is automatically checked and the air to thetelescopic cylinders is automatically turned on; i c

The provision of means for operating the shovels, preferably includingtwo sets of cables leading from suitable drums, one set becar into thepath of the flight conveyor, the

set of cables oulling the shovels back into the car also preferablybeing arranged so tl'iat the telescopic cylinders may be collapsed ordrawn back into their initial positions when it is desired towithdrawfthe apparatus from the car;

The provision of pneumatic means, preferably carried on the forwardextremities of the respective telescopic cylinders so that, as thecylinders are collapsed, any material left by the shovels in therespective ends of the car will be blown forwardly into the path of'theflight conveyor; and o The provision of pneumatic means preferablycarried on the forward end of the frame so that, as the frame withdrawn,any material left by the flight conveyor in the middle portion of thecar will be blown out of the open door.

The invention consists in the novel constructions, arrangements anddevices to be hereinafter described and claimed for carrying out theabove stated objects and such other. objects as will appear from thefollowing description of certain preferred enibodinients illustrated inthe accompanying drawings, wherein Fig. 1 is a plan view of apparatusembodying the invention operatively posit oned 1n a box car, the roofof; the car havingbeen removed, and certain parts of the apparatushaving been omitted to avoid confusion;

Fig. 2 is a. longitudinal sectional view, taken on. the line 2-2* ofFig. 1;

Fig. 3 is. a sectional view, on an enlarged scale,'taken on. the line3,3 of Fig. 1;

Fig. 4 is a plan view of the apparatus shown in Fig. 3, the. telescopiccylinder-s being in. their collapsed or inoperative positions;

Fig. 5 is a sectional view taken on the line 5+5 of Fi 4, showing thebraking and holding means for certain of the drums;

Fig. 6 is a plan view of the parts shown in F i Fig. 7 is a sectional:view taken on the line 7-7 of Fig. 3;

Fig. 3 is a sectional View, on an, enlarged scale, taken on the line 38of Fig. 7, showing certainpartsof the means employed for automaticallycontrolling the operation of J the shovels Fig. 9is a sectional view, onan enlarged scale, taken on the line 9-9 of Fig. 4;

Figs. 10. and 11 are sectional views, on an enlarged scale, taken on thelines 10-1O and 1111, respectively, of Fig. 7;

Fig. 12 is a transverse sectional view, on an enlarged scale, throughone of the castings from which the extensible telescopic shovel supportsext-end to opposite sides, being taken. on the line 1212 of: Fig. 1;

Fig. 13 is a longitudinal sectional view, on an enlarged scale, of oneof the telescopic shovel supports when in a collapsed condition;

Fig. 14 isa, sectional view, on an enlarged scale, taken on the line 14-14- of Fig. 1, showing the means employed for limiting extensiblemovement of the cylinder sections;

Fig. 15 is a sectional View taken on the line 1.5.15 of Fig. 14;

Fig. 16 is a plan view of the extremity of one of the extensible shovelsupport-s;

Fig. 17 is a side elevational view of the partsshown in- Fig. 16

Fig. 18 is. a detail view showing themanner in which the pullingcables-are attached to-v the shovels.

Fig. 19isa sectional-view taken onthe;

liner-19:19 of Fi g. 18-;

Fig. 20 is an elevational view of the drive shaft;

Fig. 21 is a sectional view, on an enlarged scale, of one end of theshaft carrying the several drums, said view being taken on the line 2121of Fig. 7;

Fig. 22 is a plan View of the turn-table on which the unloadingapparatus is mounted;

Fig. 23 is a plan View of the car which supports the unloadingapparatus;

Fig. 24 a. side elevational view of the supporting car; and

Figs. 25 and-2G are sectional views taken on the lines and 262(3,respectively, of Fig. 23.

Like eharactersofreference designate like parts in the several; views.

The apparatus will now be described in detail under appropriate headingsand finally a brief statement of its mode of operation will be given.

The frame.

The apparatus is mounted on. a turn-table 30 (Figs. 3, 22 and 24) thesupporting means for which will be presently described. The framecomprises a pair of inverted U-shaped castings 31 (Fig. which are heldin spaced relationship by a plurality of transversely extending members32, 33, 34, 35 and 36 (Fig. 4), horizontal brace rods37 (Figs. 3,7 and9) being, provided to tie the front and rear legs of the castingstogether. The rear end of the frame is provided with fiangedwheels 38which are adapted to operate on rails 39 provided on the turn-table. Theforward end of the frame is provided with wheels 40 adapted to run onthe floor of a box car and on channeledrails 39 provided on theturntable. Counter-weights 41 (Fig. 22) are provided on the turn-tableto balance the sailnewhenthe frame is being moved to one SIC e.

Means for moving frame into and out of a car.

A power shaft 42 and counter-shafts 43, 44, 45, 46, 47 and 48 (Figs. 3,4, 7 and 11) are journaled in the frame, and a countershaft 49 isjournaled in bearing blocks 50 adjnstably mounted, in the side castingsof the frame. A gear 51 fixed on drive shaft 42 is in mesh with a pinion52 connected with any suitable source of power, for ex ample, a motor53. A gear 54 fixed on drive shaft42 isin mesh with a gear'55 fixed onshaft 43. A friction clutch 56 (Fig. 7) and apinion 57 are provided onshaft 43, the clutch being fixed on the. shaft and adapted to fix thepinion57 thereto. The pinion 57 is. in mesh with a gear 58 (seev alsoFig. 11) fixed onshaft 45, said gear being in mesh with a. rack; 59attached to the turntable. Drive shaft 42 rotates ina clockwisedirection, and, therefore, when clutch 56 is thrown in, gear 58 will bedriven also in a clockwise direction, and the frame will be movedforwardly, that is to say, to the right, having reference to Fig. 3, soit may be inserted through the adjacent side door of the box car.

In order to stop automatically forward movement of the frame, clutch 56is connected to one end of a rope 60,: (Fig. 4), the other end of saidrope being connected to a lever 61 (Fig. 3). When the clutch is thrownin, lever 61 is moved into the dottedline position. As the forward endof the frame approaches the inner side of the opposite door of the boxcar, the lower end of lever 61 strikes said door and further inwardmovement of the frame results in said lever being swung into thefull-line position, thus automatically throwing out clutch 56. g

A sprocket 62 (Figs. 3 and4) fixed on drive shaft 42 is connected by 'achain 63 with a sprocket 64 fixed on the shaft 44. A clutch 65 and apinion 66 (Fig. 7) are pro: vided on shaft 44, said pinion being fixedonsaid shaft when the clutch is thrownin; Pinion 66 is in mesh with gear58 (Fig. 11). It will thus be seen, when clutch 65 is thrown in, thatpinion 66 will be driven in a clockwise direction, with the consequentresult that gear 58 will be driven in a counterclockwise direction,thejframe, in that case, being moved to the left.

Movement of the frame relative to the turn-table to the left is limitedby stops 39 (Fig. 22) adapted to be engaged by the respective rearwheels 38, and to the right is limited by a. stop 59 011 the forward endof rack 59 adapted to be engaged by gear 58.

The flight conveyor.

Drive shaft 42 is provided with a clutch 67 and a pinion 68 (Figs. 4 and20), said clutch, when thrown in, fixing said pinion to said shaft.Pinion 68 is connected by chain 69 with a drivenmember 70 fixed on shaft46 (see also Fig. 3). i i

A pair of sprockets 71 is provided on the respective shafts 46, 47, 48and 49 over which endless chains 72 travel, curved plates or flights 73beingattac-hed to said chain's to form a flight conveyor. The flights 73are provided with oppositely extending stub shafts 74 (Figs. 9 and 10)on the extremities of which rollers 75 are mounted, the rollers of thelower run of the conveyor operating on horizontally extending angleirons 76 attached to the inner sides of the respective framecastings,while the rollersof the upper runof the conveyor travel on horizontallyextending tracks 77 provided on said respectiveside castings, thuspreventing sagging of the runs of the conveyor. Any

T he telesooyn'o cylinders.

A pair of castings 78 (Figs. 1, 3, 4 and 9) extend transversely acrossthe top of the frame and form the supports for the telescopic cylinders,one of which is shown in details inFigs. 12'to 15, inclusive. Each ofth-esecastings isformed with two parallel bores 79 extending fromopposite ends thereof in whicli'the cylinders are mounted, cylinders 80being adapted to extend into the left end of the car, having referenceto Figs. 1 and 2, and cylinders 81 being adapted to extend into theright end of the car. Each cylinder comprises interfitting sections 82,82 82", 82 and. 82. The connections between adjacent sections are thesame as that between section 82 and casting 78 and only the latter willbe described. Casting 78 is bored so as to form an inwardly,circumferentially extending shoulder 83, which, in co-operation with anoutwardly, circumferentially extending shoulder 84 provided on section82, forms a stop to limit outward movement of the section. A ring 85threaded on the outer end of section 82 engages the forward end ofcasting 78 and limits in ward movement of the section. The rear end llleans foi" operating the telescopic cylinders.

Mounted on the rear end of the frame is an air compressor 89 (Figs. 1, 3and'4). Drive shaft 42 is provided with a loose sprocket 90 which isconnected by a chain 91 with a sprocket 92 fixed to the compressor.Shaft 42 is also provided with a clutch 93 20) for fixing sprocket 9Othereto. A pipe 94 (Fig. 4) leads from the compressor into a receivingtank 95. A pipe 96 extends from said receiving tank to a manifold 97,the admission ofair into said manifold being controlled by a valve 98provided with an operating lever 99. Lever 99 is connected by anadjustable link 100 (Figs. 3 and 4) to the u'pperend of lever 61. Whensaid levers are in the dotted-line positions (Fig. 3), valve 98 isclosed and, when theyare in the fullline positions, said valve isopened. The admission of air to the manifold 97, therefore, isautomatically controlled. Pipes 101 (Fig. 4) extend from the manifold 97to thechambers formed at the rear ends ofthe respective telescopiccylinders, (see Fig. 13) by means of which air may be admitted to therespective cylinders and the cylinders on the opposite sides of theframe extended into the respective ends of the car.

Pipe fittings 102 (Figs. 9, 16 and 17) having valves 103 controlled bylevers .104; are provided on the outer ends of the innermost sections ofthe respective cylinders. Levers 104 are provided with wheels 105 whichstrike against the car ends when the respective cylinders are extended.)Vhen levers 10 1- are in the full-line position (Fig. 17), valves 103are closed, but, when said levers are in the dotted-line position, saidvalves are. partially open, thus relieving to a certain extent the airpressure in the telescopic cylinders, the air escaping from valves 103and passing through the respective hoses 106 attached thereto.

The 8710 0628 cmd means for opera-ting same.

Drums 107, 108, 109 and 110 (Figs. 1, 1, 7 and 21) are loosely mountedon shaft 1 1. Clutches 111, 112, 113 and 11 1 (Figs. 7 and 21) areprovided on shaft 1 1 for operatively connecting the respective drumsthereto. Clutches 111 and 113 are operated by an L-shaped lever pivotedat 115 to the frame, and clutches 112 and 114: are operated by a similarlever 116 pivoted to the frame at 116 Levers 115 and 116 are connectedby links117 and 118, respectively, to a common operating lever 1.19.

A shovel 120 (Figs. 1, 2 and 9) is associated with the telescopicsupports 80, and a shovel 121 is associated with the telescopic supports81.

Cables 122 (Figs. 1, 2 and 7) fastened at one end to drum 108 extendaround sheaves 123 swingingly connected to one of the frame tie-rods 37,the other ends of said cables being attached to shovel 120. Gables 124;fastened .at one end to drum 107v extend around sheaves 125 swinginglyconnected to the other frame tie-rod 37, the other ends of said. cablesbeing connected to shovel 121.

Cables 126 attached at one end to drum 11.0 run over sheaves 127, 128and 129, (see also Fig. 3) attached to the frame, and ex tend over thetelescopic cylinders 80 and sheaves 130 (Figs. 16 and 17) fixed to theouter ends ofsaid cylinders, the other ends of said cables beingattached to the upper side of the shovel 120. Cables 131 attached at oneend to drum 109 run over sheaves 132, 133and 13 1, attached to theframe, and extend over the telescopic cylinders81 and sheavesv 135 fixedto the outer ends of said cylinders. the other ends of said cablesbeingattached to the upper side of shovel 121.

The construction of the shovels and. the manner in which the respectivesets of cables are attached thereto is illustrated in detail the members138 are attached to each shovel in a the manner shown in Fig. 19, thearms 138 thereof projecting through plate 136. Links 139 arepivotallyconnected at one end to the, respective members 138, said linksat the other end being attached to the cables running to the respectivedrums 107 and 108.

Clips 140 (Fig. 17) are provided on the cables extendingover the sheavesattached to the outer ends of the telescopic cylinders so that thecylinders may be collapsed. and respective shovels pulled inwardlyagainstthe frame by winding up the cables on the drums 109 and'110.

The outer ends ofthe arms115 and 116 of the respective levers 115 and116 are bifurcated (Figs. 7 and 8) through which one of the respectivesets of cables 122 and 12st operates. Said cables are provided withclips 1411: and 142. Clips 141 are so positioned on saidcables that,when the shovels reach the respective ends of the car being unloaded,they will engage. and pull levers 115 and 116 into the full-line,positions, see Fig. 7, lever 119 in that case being in its full-lineposition.v Clips 142 are adapted to pass over the respective sheaves 123and 125 and are so positioned on said cables that, when the shovels, aredrawn up closely against the respective sides of the frame, as shown inFig. 9., they Willengage and shift said clutch levers into thedotted-line positions, lever 119 in that case also being in itsdotted-line position. This arrangement is for the purpose of providingfor automatic operation ofthe. shovels, as will be presently explained.

In order to prevent the various cables from unwinding too rapidly fromthe drums, counter-weighted levers 107, 108?, 109 and 110 (Figs. 5 and7), provided with brake shoes adapted to engage the rims of therespective drums, are pivotedonvshaft 4-5.

The shovels are held firmly against the respective sides of the, frame,as shown in Fig. 9, by pawls109 and 110 (Figs. 5 and 6) pivoted to theunderside of transverse frame member-84:. Said pawls are. connected by atransverse bar 110 so that both operate simultaneously and. are adaptedtov engage ratchets provided on therims. of the respective drums109 and110. Pawl 109 is pro.- vided with an opera-tingarm 109. equipped withslidable-counterweight, Drums 109 and 110 rotate ina counter-clockwisedirection when cables 1% and 131 are unwinding.

When said pawls are in engagement with the respective drum ratchets,unwinding of said cables is prevented.

Pneumatic means for cleaning out car.

cylinders are partially opened when the extremities of said cylindersreach the respective ends of the car, the air escaping through the hoses106. The'hoses 106, after the car has been substantially emptied of itscontents, hang down, see Fig. 2, and terminate a short distance abovethe car floor. These hoses are provided with forwardly projectingnozzles 143. By this arrangement, any material remaining in the car willbe blown ahead and into the path of the flight conveyor as thetelescopic cylinders 'are collapsed andthe hoses are moved toward thecenter of the car.

A pipe 144 (Figs. 3, 4 and 9) controlled by a valve 145 extends fromtank 95 to a header 146. Pipes 147 extend from the extremities of theheader 146 and terminate in nozzle 148 which projects toward the rearend of the frame. When the frame is to be withdrawn from the car, valve145 is opened, consequently air discharges through nozzles 148, blowingany material out of the car which may have been left by the flightconveyor.

The car supporting the turntable.

The turn-table 30 is rotatably mounted upon a platform 149 (Figs. 3 and24). Platform 149 is mounted on a car 150 provided with wheels 151arranged torun upon rails 152 of a standard gaugecar track. The car 150is provided with a power shaft 153 connected with any suitable source ofpower, for example, to a reversible motor 154 by a train of gears 155.Loosely mounted on shaft 153 is a sprocket 156 connected by a chain 157with a sprocket 158 fixed to one of the car axles. A clutch 159 isprovided on shaft 153 for operatively connecting sprocket 156 thereto.When clutch 159 is thrown in, the mechanism describedwill propel thecarin one direction and, when the motor is reversed, it will be propelledin the opposite direction. The car is provided with a brake shoe 160(Fig. 25) adapted to engage one of the car wheels, said shoe beingoperated by a foot lever 161.

The means for raising and lowering the tam-table.

A spocket 162, loose on power shaft 153, is connected by a chain 163 toa sprocket 164 fixed on a counter-shaft 165 journaled in the car frame.A clutch 166 is provided on shaft 153 for connecting sprocketl62thereto. A sprocket 167 fixed to shaft 165 is connected by a chain 168to a sprocket 169 fixed on a counter shaft 170 also journaled in the carframe. Platform 149 is provided with two pair of vertically extendingracks 171, one pair of said racks being in mesh with pinions 1.72 fixedto shaft 165, the other pair being in mesh with pinionsl73 fixed toshaft 170. Vihen power shaft 153 is rotated in a counter-clockwisedirection, shafts 165 and 170 will also rotate in a similar direction,and the platform 149 will be raised. The platform is held in the desiredelevated position by a lever 17 4 having teeth adapted to engage aratchet wheel 175 fixed on the shaft 153 (Fig. 26). The shaft 153 isprovided with a brake drum 176 which is engaged by a foot lever 177.When it is desired to lower the platform, the operator stands upon thelever 177 and raises the lever 174, thus permitting the platform todescend. If it is diflicult to disengage the teeth of the lever 174 fromratchet 175, motor 154 may be started to turn shaft 153 slightly in acounter-clockwise direction, thus enabling the operator to raise thelever.

Operation.

The car supporting the apparatus is run on a track extending alongsidethe track on which the cars to be unloaded are placed. As the unloadingapparatus is mounted on a turn-table, it will be obvious that the carsupporting the apparatus may be run on a track located between twotracks on each of which cars to be unloaded are placed. The cars to beunloaded are spotted over the track hoppers (not shown) so that materialremoved through one of the side doors of the cars will flow into therespective hoppers.

Assuming that the unloading mechanisms are in the positions shown inFig. 4 and the frame supporting said mechanisms rests entirely upon theturn-table with the forward end of the frame pointed toward the right,having reference to Fig; 3, clutch 159 (Fig. 23) on the car is thrown inand motor 154 is operated to bring the unloading apparatns opposite theadjacent side door of the car to be unloaded. Clutch 159 is then thrownout. Unless the rails 39 and 39 on the turntable are at the desiredlevel, platform 149 is raised or lowered vertically, in the mannerheretofore described, to bring the upper surface of said railssubstantially level with the'car floor. Current to the motor 154 may nowbe turned off.

Assuming that all the clutches associated with the unloading apparatusare inoperative and all the valves controlling the air are closed,current to motor 53 (Figs. 1 and 4) is turned on and drive shaft 42 isrotated in a clockwise direction. Clutch 93 (Fig. 20) is next thrown in,connecting the air compressor with drive shaft 42, air being forced intotank 95 and pipe 96 as far as lit) valve 98. Clutch 67 (Figs. 4 and 20)is next thrown in, thus connecting shaft 16 with drive shaft 12, bothrotating in a clockwise direction and causing the flight conveyor totravel in a similar direction. Clutch 56 (Fig. 7 on shaft a3 is nowthrown in, connecting said shaft with drive shaft 42. As shaft 13 isdriven in a counter-clockwise direction (Fig. 11) and is connected withshaft 15, the latter is driven in a clockwise direction, gear 58 fixedthereto travelling to the left over rack 59 on the turn-table. Thus theframe carrying the unloading apparatus is moved forwardly on theturn-table and inserted through the adjacent side door of the car. Theflight conveyor being in operation, the material in that portion of thecar adjacent said door is removed from the car and flows into the trackhopper as the frame progressively moves to the left into the car.Throwing in clutch 56 pulls rope 60 rearwardly and lever 61 (Fig. 3) ismoved into its dotted-line position. As the forward end of the frameapproaches the inner side of the opposite door of the car, the lower endof the lever 61 strikes said door and further inward movement of theframe results in said lever being swung into its full-line pos tion,thus automatically throwing out clutch 56 and stopping movement of theframe.

Movement of the lever 61 into its full-line position also opens valve98, air being admitted to manifold 97; the pipes 101 and the two sets oftelescopic cylinders being automatically extended into the respectiveends of the car.

As these cylinders are extended, cables 126 and 131 unwind from therespective drums 110 and 109, the pawls 110 and 109 (Fig. 5 and 6)having previously been disengaged from the respective ratchets on saiddrums. When the telescopic cylinders reach the respective ends of thecar, the respective wheels 105 (Fig. 17) abut against the car ends andthey move into the dotted-line position, thus partially opening valves103, relieving the pressure in the telescopic cylinders to a certainextent and checking further inward movement of the cylinders, the airescaping through hoses 106.

Lever 119 (Fig. 7) is now moved into its dotted-line position andclutch-es 113 and 114 are moved into engagement with the respectivedrums 109 and 110, thus fixing said drums to shaft 44 which is operatingin a clockwise direction. Cables 126 and 131 are wound upon therespective drums and the shovels 120 and 121 are pulled from theirpositions of rest against the respective sides of the frame, as shown inFig. 9, over the material and into the respective ends of the car, seeFigs. 1 and 2, cables 122 and 124; unwinding from the respective "drums108 and 107. The level of the material in the car at this time issubstantially as indicated in dotted-lines in Fig. 2. Lever 119 is thenmoved to its full-line position, thus disengaging clutches 113 and 114:from the respective drums 109 and 110 and throwing in clutches 111 and112 into engagement with the respective drums 107 and 108. Drums 107 and108 now wind up the respective cables 12 1 and 122, thus pulling therespec tive shovels toward the frame, the material in front of saidshovels being pulled into the path of the flight conveyor. As theshovels are pulled toward the frame by the respective cables 12 1 and122, the cables on the drums 109 and 110 are unwound.

It will be noted from Figs. 9 and 10 that the links 139, connecting thecables 124: and 122 to the respective shovels, are attached to therespective Shovels somewhat above the horizontal axis of the shovels. Apull upon these cables, therefore, results in the shovels being movedinto a substantially vertical position, the links 139 engaging the underside of the arms 138 which at this time are in a substantiallyhorizontal position.

By swinging the lever 119, therefore, to

the left and to the right, the respective shovels may be pulledbackwardly and forwardly in the respective ends of the car untilsubstantially all of the material therein is removed into the path ofthe flight conveyor. By providing clips 1 11 and 1&2 properly positionedon the respective cables 122 and 124:, the shovels may be automaticallymoved backwardly and forwardly in the car.

After substantially all of the material has been removed from the endsof the car by the respective shovels, the shovels are pulled back intothe ends of the car for the last time by winding up the cables 126 and131 on the respective drums 110 and 109, resulting in clips 140 (Fig.17) engaging the respective housings which support the respectivesheaves 135 and 130 on the outer ends of the respective telescopiccylii'iders; and, continued rotation of the drums 110 and 109 willresult in the telescopic cylinders being collapsed and the shovelsreturned to their initial positions against the respective sides of theframe, as shown in Fig. 9. Lever 119 is then moved into its full-lineposition to cause drums 107 and 108 to rotate and wind up the slackcables 12 1 and 122.

As the telescopic cylinders are collapsed, the air therein is forced ata high velocity out of the nozzles 1 13 (Fig. 17), attached to the lowerends of the respective hoses 106, which at this time hang in a verticalposition, and any material remaining in the re spective ends of the caris blown ahead of the nozzles and into the path of the flight conveyor.

It is now desirable to close valves 103 controlling the escape of airfrom the respective telescopic cylinders, which makes it necessary tomove the respective levers 104 and wheels 105 from their dotted-linepositions (Fig. 17) into their full-line positions. This may beaccomplished by providing levers 178 and 179 (Fig. 4) pivoted on theframe, their outer ends being adapted to engage the respective wheels105. The inner ends of levers 178 are attached, to a rope 180, the rearend of said rope being fixed to the rear end of the frame, the other endof said rope extending over a sheave at the forward end. of the frameand being attached to a weight 181. The inner ends of levers 179 are attached to a rope 182 fastened at its rear end to the rear end of theframe, its other end extending over a sheave at the forward end of theframe and being connected to a weight 183. A pull upon rope 180 willresult in levers 178 being swung in a clockwise direction, and a pullupon rope 182 will result in levers 179 being swung ina'counter-clockwise direction, thus pushing the respective wheels 105into the full-line position shown in Fig. 17 and closing the respectivevalves 103.

Valve 145 (Fig. 4) is now opened and air admitted to pipe 144, header146 and hoses 147 (Fig. ,3). Clutch (Figs. 7 and 21) is now thrown in,which connects shaft 44 rotating in a clockwise direction with shaft 45,causing the latter to rotate in a counterclockwise direction. Gear 58,therefore, moves backwardly relative to the rack 59 fixed to theturn-table, and the frame and unloading apparatus are withdrawn from thecar. As the apparatus is withdrawn from the car, the air dischargesthrough nozzles 148 attached to the hoses 147 and any material that mayhave been left in the middle portion of the car by the flight conveyoris blown out of the car.

When the apparatus is entirely withdrawn from the car, clutch 65 isthrown out, stopping further backward movement of the frame, clutch 67is thrown out to stop movement of the flight conveyor, clutch 93 isthrown out to stop the air compressor and motor 53 is stopped. Air valve145 is closed and valve 98 is closed by pulling on the rope 60, movinglever 61 to. its dotted-line position. The unloading apparatus is now atrest and ready to be moved to the next car to be unloaded. After allthe. cars on the track at one side of the apparatus have been of time.Since the unloading apparatus and i the car on which it is mounted maybe operated by a single person, the saving in labor is very noteworth Itis not intended to limit the invention to the details of constructionshown and described except only in so far as certain of the appendedclaims are specifically so limited, as it will be obvious that numerousmodifications may be made without departing from the principles of theinvention.

I claim: I

1. In box car unloading apparatus, the combination of means adapted toenter through one of the side doors of a car for removing material fromthat portion of the car adjacent saiddoor, and means associated withsaid first mentioned means and insertable through said door therewithfor moving material from one end of the car into the field of operationof said first mentioned means.

- 2. In box car unloading apparatus, the combination of means adapted toenter through one of the side doors of a car for removing material from,that portion of the 9 car adjacent said door, and means associated withthe opposite sides of said first mentioned means and insertable throughsaid doortherewith for moving material from the respective ends of saidcar into the field of operation of said first mentioned means.

3. In box car unloading apparatus, the combination of a frame adapted tobe inserted through one of the side doors of a car, conveying meansassociated with said frame for removing material from that portion ofthe car adjacent sald door, and means associated with said frame andinsert-able through said door therewith for moving ma. terial from oneend of the car into the path of said conveyor.

4. In box car unloading apparatus, the combination of a frame adapted tobe inserted through one of the side doors of a car, conveying meansassociated with said frame for removing material from that portion ofthe car adjacent said door, and means associated with the oppositesides'of said frame and insertable through said door therewith formoving material from the r spective ends of said car into the path ofsaid conveyor.

5. In box car unloading apparatus, the combination of a frame adapted tobe in serted through one of the side doorsof a car, conveying meansassociated with said frame for removing material from that portion ofthe caradjacent said door, extensible supporting means adapted to extendfrom opposite sides of said frame into the respective ends of said car,and means associated with said supporting means for moving the materialfrom the respective ends of the car into the path of said conveyingmeans.

6. In box car unloading apparatus, the combination of a frame adapted tobe inserted through one of the side doors of a car, conveying meansassociated with said frame for removing material from that portion ofthe car adjacent said door, extensible supporting means adapted toextendfrom opposite sides of said frame into the, respective ends of-said car,and scoop means associated with said supporting means'formoving thematerial from the respective ends of the car into the path of saidconveyor.

7. In box car unloading apparatus, the combination of aframe adaptedto-be inserted through one of the side-doors of a car, conveying meansassociated with said frame for removing material from that portion ofthe car adjacent said door, extensible supporting means adapted toextend from opposite sides of said frame into there-spective ends ofsaid car, scoop means'associated with said supporting means,and-meansfor moving said scoop means backwardly and forwardly in saidcar, whereby the-material in the respective ends ofsaid-car may be movedinto the-path'of said conveyor.

8.'In boX car unloading apparatus, the combination of a supporting'structure adapted to run upon-a track adjacent that on which'thecar-to'be unloaded is placed, means carried by said structureandadaptedto enter through the adjacent-side door :of said car for removingmaterial from that portion of the car adjacent said door, and meansassociated with said first mentioned means and insert-able through saiddoor therewith for moving material from one endofthe car into thefield-'of-operation of said first mentioned means.

9. In box car unloading apparatus, the combination of a supportingstructure adapted to run upon a trackadjacentuthat on which the carto-be unloaded is placed, a frame slidably carried-by said structure andadapted to be insertedthroughthe adjacent side door of said car,conveying means associated with said frame .for removi-ng'material fromthat portion ofthe caradjacent said door, and means associated withsaidframe and insertable through said .door therewith for moving materialfrom. onejend of the car into the path ofsaidconveyor.

10. In box car unloading apparatus, :the combination of a supportingstructure adapted to run upon a track adjacentthat on which cars to beunloaded-are placed, means associated with said .structureto propel thesame, means carried by-saidstructure and adapted to enterthrough theadjacent side door of a CZII'CEOPrIBHlOVll'lQZIHfilZQ- rial from thatportion-of thGx-Gill adjacent said door, and means associated with saidfirst mentioned means and insertable through said door therewith for.moving materialfrom one end of'the car intoithe field ofopcrationofsaid/first .mentioned means. a

11. Inbox car unloading apparatus, the combination of a supportingstructure adapted to run upon aatracl: adjacent that on which cars .tohe unloaded are placed,

amass;

"-means' associated with'said structure to .pro-

the car adjacent said door, :and meansassociated with said frame andinsertable through said door therewith for moving material from-one endot-the car into the path of said conveyor.

12. In'boXcar unloadingappa 'atus, the combination of asupportingstructure vertically adjustable :means vslid'ablyassociatedwith said structure and adapted to enter :throughthe-adjacentsidedoor-of a car for removingmaterial :from that portion of thecar-adjacent said ClOOlQfiHClJnQflDS associated with said firstmentioned means for moving material :fromone end "of :the car into thenfield of operation of said first mentioned means.

13. In box -car unloading apparatus, the combination of a supportingstructure, a vertically adjustable frame slidably carried bysaidLstructu-re r and adapted 1 to be inserted through theadjacentsidedoor.of a car, con- -.\-'eying means associated with saidframe for removing .material from that portion of -the car adjacent.said door, and means asso-.

.ciated with -said frame :for moving material :from one end of the carinto the path of saidv conveyor.

.14. iIn-boxcar unloading apparatus, the .combination of" a supporting.structure, a platform carried by said structure, means to raise or lowersaid platform, means slidably associated with said platformrand adaptedtoenter through the adjacentside, door of acar for removingmaterialifromthatportion .of the car adjacent said door, and meansassociated with said second mentioned tmeans formoving material into thefield of operation, of said second mentioned means.

15. In box car unloadingapparatus, the combination of a supportingstructure, a platform, racks attached to said platform, pinions carried;by said structure and in -mesh with said respective racks, means todrive said pinions, means ,slidably asso ciated with said-,platform.-and adapted to enter througlrthe adjacent side door of a earfor removing material fromthat portion of the caradjacent-said door, andmeans associated with said second mentioned means for movingmaterialintofihe field of "operation of saidsecond mentioned means.

16. In a box carunloading apparatus, the combination of a supportingvstructure adapted-to runupona track adjacent that on which-carsto-beunloaded are placed, means associated withusaid structure to propel thesame, a platform carried by said structure, neansto raise, orlower ,saidplatform, means .slidably associated with-said platform and adapted toenter through the adjacent side door of a car for removing material fromthat port on-of the car ad acent said door, and means associated withadapted to run upon a track adjacent that on which cars to be unloadedare placed, a power shaft on said structure, means connected With saidshaft and adapted to propel said structure, a platform carried by saidstructure, means connected With said shaft and adapted to raise or lowersaid platform, means slid-ably associated with said platform and adaptedto enter through the adj acent side door of, a car for removing materialfrom that portion of the car adjacent said door, and means associatedwith said third mentioned means for moving material into the field ofoperation ofsaid third mentioned means. 7

18. In box car unloading apparatus, the combination of a supportingstructure adapted to be placed between two tracks on which cars to beunloaded may be placed,

a turn-table mounted on said structure,

means slidably associated with said turntable and adapted to enterthrough one of,

the side doors of a car, for removing material from that portlon of thecar ad acent said door, and means assoclated with said first mentionedmeans for moving material from one end of the car into the'field of operation of said first mentioned means.

19. In box car unloading apparatus, the combination of a supportingstructure adapted to be placed between two tracks on which cars to beunloaded may be placed, a turn-table mounted on said structure, a frameslidably mounted 011 said turn-table and adapted to enter through one ofthe side doors of a car, conveyor means carried by said frame forremoving material from that portion of the car adjacent said door, andmeans associated with said frame for moving material from one end of thecar into the lield of operation of said conveyor means.

20. In box car unloading apparatus, the combination of aSl11f)p(')l'tlI1g structure, a

frame mounted on said structure and adapt-' ed to be inserted throughone of the side doors of a car an endless conveyor on the under side ofsaid frame for moving material from the car out of said door, means fordriving said conveyor. tracks on said frame substantially parallel. withthe upper and lower runs of said conveyor, and roll ers on said conveyorand adapted to run upon said tracks, for thepurpose specified.

21. In box car unloading apparatus, the combination of a supportingstructure, a

frame mounted on said structure, and adapt ed to be inserted through oneof the side doors of a car,a flight conveyor on the under side of saidframe for moving material from the car out of said door, means fordriving said conveyor, means for moving said frame into said car, meansfor automatically stopping movement of said frame When it is operativelypositioned in said car, and means associated with said frame for movingmaterial from the respective ends of said car into the field ofoperation of said conveyor. 22. In box car unloading apparatus, thecombination of a supporting structure, a frame mounted on saidstructure, means whereby said frame may be moved on said structure andinserted through one of the side doors of a car, conveying meansassociated with said frame for removing material from that portion ofthe car adjacentsaid door, and means associated with said frame andinsertable through said door therewith for moving material from one endof the car into the path of said conveyor.

23. In box car unloadingapparatus, the combination of means adapted tobe inserted through one of the side doors of a car for removing materialfrom thatportion of the ear adjacent said door, extensible supportingmeans carried by said first-named means and adapted to extend into oneend of the car, and means associated With said supporting means formoving material from the end of the car into the field of operation ofsaid ed through one of the side doors of a car,-

conveying means carried by said frame for removing material from thatportion of thecar adjacent saiddoor, extensible supporting means carriedby said frame and adapted to extend into one end of the car, and meansassociated with said supporting means for moving material from the endof the car into the path of said conveying means.

25. In box car unloading apparatus, the combination of a frame adaptedto be inserted through one of the side doors of a car, conveying meanscarried by said frame for removing material from that portion of the caradjacent said door, extensible supporting means carried by said frameand adapted to extend into one end of the car, and scoop meansassociated with said supporting means for moving materialfrom the end ofthe car into the path of said conveying means.

26. In box car unloading apparatus, the combination of a frame adaptedto be inserted through one of the side doors of a car, conveying meanscarried by said frame for removing material from that portion of the caradjacent said door, extensible sup ortmeans associated with saidsupporting means, and means for moving said scoop means baclnvardly andforwardly in said, car, whereby the material in the end of said car maybe moved into the path of said conveyor.

27. In box car unloading apparatus, the combination of means adapted tobe inserted through one of the side doors of a car for removingn'iaterial from that portion of the car adjacent said door, telescopicsupporting means carried by said first-named means and adapted to extendinto one end of the 'ar, pneumatic means for extending said supportingmeans, and means associated with said supporting means for movingmaterial from the end of the car into the held of operation of saidfirst-named means.

28. In box car unloading apparatus, the combination of a frame adaptedto be inserted through one of the side doors of a car, conveying meansassociated with said frame for removing material from that portion ofthe car adjacent said door, telescopic supporting means carried by saidframe and adapted to extend into the respective ends of said car, andmeans associated with said supporting means for removing the materialfrom the respective ends of the car into the path of said conveyor.

29. In box car unloading apparatus, the combination of a frame adaptedto be inserted through one of the side doors of a car, conveying meansassociated with said frame for removing material from that portion ofthe car adjacent said door, telescopic cylinders carried on therespective sides of said frame, pneumatic means for extending saidcylinders into the respective ends of said car, and means associatedwith said cylinders for removing the material from the respective endsof the car into the path of said conveyor.

30. In box car unloading apparatus, the combination of a frame adaptedto be inserted through one of the side doors of a car, conveying meansassociated with said frame for removing material from that portion ofthe car adjacent said door, telescopic supporting means carried by saidframe and adapted to extend into the respective ends of said car, meansfor automatically stopping movement of said supporting means when thelatter are in operative position in the car, and means associated withsaid supporting means for removing the material from the respective endsof the car into the path of said conveyor.

31. In box car unloading apparatus, the combination of a frame adaptedto be inserted through one of the side doors of car, conveying meansassociated with said frame for removing material from that portion ofthe car adjacent said door, telescopic cylinders carried on therespective sides of said frame, pneumatic means for extending saidcylinders into the respective ends of said car, means for automaticallystopping movement of said cylinders when the latter are in operativeposition in the car, and means associated with said cylinders forremoving the material from the respective ends of the car into the pathof said conveyor.

32. In box car unloading apparatus, the combination of a supportingstructure, a frame mounted on said structure, means whereby said framemay be moved relative to said structure and inserted through one of theside doors of a car, extensible supporting means carried by said frameand adapted to extend into one end of the car, means associated withsaid supporting means for removing material from the end of the car intothe vicinity of said door, and means whereby movement of the frame intothe car is automatically stopped and said SllPpOl'ling means isautomatically extended.

33. In box car unloading apparatus, the combination of a supportingstructure, a framemounted on said structure, means wherel'iy said framemay be moved on said structure and inserted through one of the sidedoors of a car, conveying means associated with said frame for removingmaterial from that portion of the car adjacent said door, extensiblesupports associated with said frame and adapted to extend into thercspcw tive ends of the car, means associated with said supports forremoving material from the respective ends of the car into the path ofsaid conveying means, and means whereby movement of the frame into thecar is automatically stopped and said supports are automaticallyextended.

34. In box car unloading apparatus, the combination of a su 'iportingstructure, a frame mounted on said structure, means whereby said framemay be moved on said structure and insertedv through one of the sidedoors of a car, conveying means associated with said frame for renmvingmaterial from that portion of the car adjacent said. door, telescopiccylinders associated with said frame and adapted to extend into therespective ends of the car, pnenn ic means for extending said cylinders,means a ociated with said cylinders for removing material from therespective ends of the. car into the path of said conveying means, andmeans whereby movement of the frame in to the car is automaticallystopped and the air to said cylinders is automatically turned on.

35. In box car unloading apparatus, the combination of a frame adaptedto be inserted through one of the side doors of a car, drums on saidframe, conveying means associated with said frame for removing materialfrom that portion of the car adjacent said door, extensible supportingmeans lill) adapted to extendfrom opposite sides of said frame into therespective ends of said car, scoops associated with said respectivesupporting means, cables extending from said scoops to said drums, andcables extending from said drums overs-aid supporting means to saidscoops.

36. In box car unloading apparatus, the combination of a frame adaptedto be in serted through one of the side doors of a car, drums on saidframe, conveying means associated with said frame for removing materialfrom that portion .of the car adyacent said door, extensible supportingmeans adapted to extend from opposite sides of said frameinto therespective endsof said car, scoops associated with saidrespec tivesupporting means, cables extending from said scoops to said drums,cables extending from said drums over said supporting means, and meanswhereby said drums are operated automatically and said scoops drawnbackwardly and forwardly in said car, for the purpose specified.

37. In box ear unloading apparatus, the combination of means insertablethrough one of the .sidedoors of a'car and adapted to remove materialfrom that portion of the car adjacent said door, scoop means adapted toremove material from one end of the car into the field of operation ofsaid first mentioned means, means for drawing said scoop meansbackwardly and forwardly in the end till of the car, and means forautomatically reversing thetravel of said scoop means.

38. In box car unloading apparatus, the combination of a frame adaptedto be .insorted through one of the side doors of a car, conveying meansassociated with said framefor removing material from the car, and meansincluding nozzles carried ionthe forward end of the frame fordischarging air under pressure, whereby any material left in the car inthe vicinity of said conveying means may be blown out of the car.

39. In box car unloading apparatus, the combination of a frame adaptedto be insorted through one of the side doors of a car, conveying meansassociated with said frame for removing material from that portion ofthe car adjacent the door, means adapted to be moved backwardly andforwardly for removing material from the respective ends of the car intothe path of said conveying n'ieans, and 'n'ieun'iatic means includingdischarge nozzles assoclated with the respective second, mentioned meansfor discharging an' under pressure, whereby material left in therespective ends of the car by said second mentioned means may be blowntoward said conveying means.

4.0. In box car unloading apparatus, the con'ibination of a frameadapted to be inserted through one of the side'doors of a car, conveyingmeans associated with said ciated withsaid cylindersfor removingmaterial from the respective ends of the car into the path of saidconveying means, hoses provided with discharge nozzles connected to therespective outer ends of saidcylinders whereby air under pressure willbe discharged through said nozzles as said cylinders are collapsed andmaterial left in the respective ends of the car by said third mentionedmeans will be blown toward said conveying means, and pneumatic'means ineluding hoses provided with discharge nozzles carried by the forward endof said frame, whereby any material left in the car by said conveyingmeans will be blown out of the door as the frame is withdrawn.

7 41. In box car unloading apparatus, the combination of a supportingstructure, a frame slidably mounted on said structure and adapted to beinserted through one of the sidedoors of a car, means for moving saidframe into the car, and means for antomatically stopping movement of theframe when it is fully inserted in the car;

42. In box car unloading apparatus, the combination are supportingstructure, a frame slidably mounted on said structure and adapted to beinserted through one of the side doors of a car,means controlled by anoperating member for: moving said frame into the car, a member carriedby said frame and adapted to be actuated when said frame is fullyinserted in the car, and means connecting said operatingand actuatingmem- 'combinati on of a supporting structure adapted to be insertedthrough one of the side doors of a car, extensible pneumaticallyoperated supporting means carried by said structure and adapted toextend into one end of the car, and means connected to said supportingmeans for removing material from the end of the car into thevicii'iity'of said door. 7

45. In box car unloading apparatus, the combination of a supportingstructure, a frame carried by said structure and adapted to be insertedthrough one ofthe side doors of a car, means controlled by an operatinglit) member for moving said frame into the car, extensible supportingmeans carried by said frame and adapted to extend into one end of thecar, means controlled by an operating member for extending saidsupporting means, a member carried by said frame and adapted to beactuated When said frame is fully inserted in said car, and meansconnecting said operating members With said actuating member, for thepurpose specified.

46. In box car unloading apparatus, the combination of a supportingstructure, a frame slidably mounted on said structure and adapted to beinserted through one of the side doors of a car, means for moving saidframe into the car, extensible supporting means carried by saidstructure and adapted to extend into one end of the car, and meansautomatically operable upon said frame being fully inserted in the carfor extending said supporting means.

47. In box car unloading apparatus, the combination of a supportingstructure adapted to be inserted through one of the side doors of a car,drums on said structure, extensible supporting means carried by saidstructure and adapted to extend into one end of the ear, scoop means,cable means connected to said scoop means and certain of said drums, andcable means connected to the other of said drums and extending over saidsupporting means and being connected to said scoop means, whereby saidscoop means may be drawn l'iackwardly and for- \vardly in the end of thecar to remove the material in the end of the car into the vicinity ofthe car door.

4:8. In box car unloading apparatus, the combination of a supportingstructure adapted to be inserted through one of the side doors of a car,drums on said structure, extensible supporting means carried by saidstructure and adapted to extend into one end of the car, scoop means,cable means connected to said scoop means and certain of said drums,cable means connected to the other of said drums and extending over saidsupporting means and being connected to said scoop means whereby saidscoop means may be drawn backwardly and for wvardly in the end of theear. and means antomatically operable upon the scoop means reachingeither end of its excursion for reversing the operation of the drums andcansing the scoop means to travel in the opposite direction.

-19. In box car unloading apparatus, the combination of a supportingstructure adapted to be inserted through one of the side doors of a car,extensible supporting means carried by said structure and adapted toextend into one end of the car, means for extending and contracting saidsupporting means, means carried by said supporting means for removingmaterial from the end of the car into the vicinity of said door, andpneumatic means including nozzles carried by said supporting means fordischarging air under pressure as said supporting means is contacted,for the purpose specified.

50. In box car unloading apparatus, the combination of a supportingstructure adapted to be inserted through one of the side doors of a car,extensible supporting means carried by said structure and adapted toextend into one end of the car, means for extending said supportingmeans, a scoop, means for drawing said scoop from the vicinity of thecar door into the end of the car, and means for pulling the scoop fromthe end of the ear towards said door, said last named means also servingto collapse said supporting means.

51. A car unloading machine, comprising in combination a frame adaptedto be inserted transversely of the car through the side door thereof, anextensible boom carried by the end portion of the frame, means forextending said boom longitudinally of the car, a scraper, and means formoving said scraper back and forth along said boom for moving thecontents of the car toward the side door of the car.

52. A car unloading machine, comprising in combination a frame, meansfor moving one end of said frame into the side door of the car, a boomcarried by the end portion of the frame and adapted to be extendedtherefrom longitudinally of the car, and discl'large means reciprocablealong the boom for moving the contents of the car toward the side doorof the car.

53. A car unloading machine, comprising in combination a frame adaptedto be inserted transversely of the car through the side door thereof, anextensible boom carried by the end portion of the frame and adapted tobe extended therefrom longitudinally of the car, a sheave revolublymounted on the end portion of said boom, cable means extending aboutsaid sheave, a scraper connected with said cable means, and means forreciprocating said cable means for drawing the scraper back and forthalong the boom for moving the contents of the car toward the side doorof the car.

54. A. car unloading machine, comprising in combination a frame adaptedto be inserted transversely of the car through the side door thereof, anextensible boom carried by the end potion of the frame and adapted to beextended therefrom longitudinally of the car, a scraper, a motor, andmeans driven by the motor for extending said boom toward the end of thecar and then for moving the scraper back and forth along the boom.

55. A car unloading mechine, comprising in combination a frame adaptedto be inserted transversely of the car through the

